There was a statistically significant increased number of supraspinatus (P 0.007) and infraspinatus (P = 0.03) tears in a comparison of subjects with os acromiale and step-off deformity (10/42) vs os acromiale without step-off deformity (32/42). No statistically significant difference between the os acromiale and control groups was noted, either on magnetic resonance imaging or arthroscopy, with regard to tears of the supraspinatus (P = 1.000 and 0.981, respectively) and infraspinatus (P = 1.000 and 0.667, respectively) tendons.
Analysis of os acromiale type, ossicle synchondrosis edema, acromioclavicular joint degenerative changes and step-off deformity at the synchondrosis were tabulated. Statistical analyses were performed to determine differences between groups regarding rotator cuff tears affecting the supraspinatus and infraspinatus tendons detected by magnetic resonance imaging and arthroscopy. Arthroscopy data were available in 19 os acromiale and 12 control subjects. Forty-two subjects with os acromiale (n = 42 32 men and ten women, age 25-81 years, mean 47.6 years) were compared with age- and gender-matched subjects with no evidence of os acromiale (controls). We retrospectively analyzed 84 magnetic resonance imaging studies of the shoulder. To re-evaluate the relationship between os acromiale and rotator cuff tears. Re-examining the association of os acromiale with supraspinatus and infraspinatus tears
We evaluate several imaging features which may be used to diagnose an os acromiale in these cases. The identification of this anomaly is important as it frequently alters the type of surgical procedure utilized in symptomatic patients. When axial MR sections do not include the acromioclavicular joint, the diagnosis of this often subtle abnormality will rest on its recognition on oblique coronal and sagittal images where it mimics the acromioclavicular joint. International Nuclear Information System (INIS)Īn os acromiale is a developmental abnormality of ossification involving the anterior acromion which may contribute to impingement and rotator cuff disease. [Hospital of the University of Pennsylvania, Department of Radiology, Philadelphia (United States)Īn os acromiale is a developmental abnormality of ossification involving the anterior acromion which may contribute to impingement and rotator cuff disease. [Hospital of the University of Pennsylvania, Department of Radiology, Philadelphia (United States) Herzog, R. |[Hospital of the University of Pennsylvania, Department of Radiology, Philadelphia (United States) Kneeland, J.B. Os acromiale: evaluation of markers for identification on sagittal and coronal oblique MR imagesĮnergy Technology Data Exchange (ETDEWEB)
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